The transformation of organizational and productive models and the development of service sector are accompanied with the emergence of new claims in the field of health at work. Trough the themes of stress, burn out, mobbing or repetitive strain injuries, the mental health and well being at work are the subject of many trade unions actions, academic researches and newspapers article. Most of these researches are conduct by psychologists or doctor in medicine. So, when sociologists deal with this subject, they use to refer to psychological or even medical works. Even if stress, burn out or mobbing are frequent complaints at work, sociology of work paid little attention to these questions. Most of the time, quick references are made to psychosocial or psychodynamic researches and difficult challenges as labeling, subjective appraisal, different ways of managing difficulties...